Comparison of Diagnostic Accuracy between Octopus 900 and Goldmann Kinetic Visual Fields
Figure 3
(a) Bland-Altman analysis: I4e peripheral area. (i) The dotted lines represent ±1.96SD with limits of agreement of −2731 to 2239. The solid line represents the mean bias of −246.17 degrees2. (ii) The dotted lines represent ±1.96SD with limits of agreement of −2433 to 2110. The solid line represents the mean bias of −161.54 degrees2. (iii) The dotted lines represent ±1.96SD with limits of agreement of −1601 to 1631. The solid line represents the mean bias of −15.24 degrees2. There is good correlation with distribution of differences across increasing average close to mean bias and within limits of agreement. (b) Bland-Altman analysis: I2e stimulus area. (i) The dotted lines represent ±1.96SD with limits of agreement of −2029 to 943. The solid line represents the mean bias of −542.81 degrees2. (ii) The dotted lines represent ±1.96SD with limits of agreement of −1825 to 852. The solid line represents the mean bias of −486.45 degrees2. The comparison of isopter area using different speeds is significant (). There is no correlation between areas obtained using different stimulus speeds with variability noted across all comparisons. (iii) The dotted lines represent ±1.96SD with limits of agreement of −1694 to 1596. The solid line represents the mean bias of −48.95 degrees2. (c) Bland-Altman analysis: I4e blind spot stimulus area. (i) The dotted lines represent ±1.96SD with limits of agreement of 5 to 117. The solid line represents the mean bias of 61.46 degrees2. The comparison of isopter area using different speeds is significant (). There is no correlation between areas obtained using different stimulus speeds with variability noted across all comparisons. (ii) The dotted lines represent ±1.96SD with limits of agreement of 22 to 138. The solid line represents the mean bias of 80.25 degrees2. The comparison of isopter area using different speeds is significant (). There is no correlation between areas obtained using different stimulus speeds with variability noted across all comparisons. (iii) The dotted lines represent ±1.96SD with limits of agreement of −59 to 20. The solid line represents the mean bias of −19.87 degrees2. The comparison of isopter area using different speeds is significant (). There is no correlation between areas obtained using different stimulus speeds with variability noted across all comparisons.
